Parameter rated		N	Mean	Std. Deviation	P-value
System Knowledge	Self-rating	19	4.52	0.52	0.756
System Knowledge	ToT	19	4.55	0.50	0.756
Scanning	Self-rating	19	4.60	0.49	0.834
Scanning	ToT	19	4.47	0.64	0.834
Operating Parameters	Self-rating	19	4.22	0.71	0.621
Operating Parameters	ToT	19	4.14	0.70	0.621
Scanning as per Protocol	Self-rating	19	4.28	0.59	0.929
Scanning as per Protocol	ToT	19	4.23	0.71	0.929
Determining the appropriate first trimester protocol	Self-rating	19	3.68	0.95	0.520
Determining the appropriate first trimester protocol	ToT	19	3.89	0.76	0.520
Performing the embryonic to fetal phase protocol	Self-rating	19	3.86	0.72	0.595
Performing the embryonic to fetal phase protocol	ToT	19	3.82	0.71	0.595
Performing the 11 weeks to 13 weeks + 6 days protocol	Self-rating	19	3.98	0.73	0.723
Performing the 11 weeks to 13 weeks + 6 days protocol	ToT	19	4.07	0.57	0.723
Evaluating the uterus and placenta	Self-rating	19	4.05	0.65	0.307
Evaluating the uterus and placenta	ToT	19	3.85	0.58	0.307
Evaluating the head and face anatomy	Self-rating	19	4.50	0.75	0.040*
Evaluating the head and face anatomy	ToT	19	3.92	0.69	0.040*
Evaluating the chest and heart anatomy	Self-rating	19	4.63	0.96	0.506
Evaluating the chest and heart anatomy	ToT	19	4.58	0.77	0.506
Evaluating the abdomen and pelvis anatomy	Self-rating	19	3.96	0.87	0.027*
Evaluating the abdomen and pelvis anatomy	ToT	19	3.61	0.62	0.027*
Evaluating the anatomy of the spine and extremities	Self-rating	19	4.23	0.80	0.044*
Evaluating the anatomy of the spine and extremities	ToT	19	3.92	0.48	0.044*